 | ตะโพก ร้าย Hip Dysplasia |
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This is a disorder that has been proven to have a genetic basis. It is not caused by nutrition. Hips are affected by a large number of genes: some may be recessive. The problem is that we don't know how to identify any of them. We do Hip x-rays to eliminate dogs from breedings that are affected. This lessens the likelyhood of passing the genes that can produce it. We know that two "normal" dogs can produce dysplastic puppies. Alone the parents do not have the combination that creates dysplasia, they are unaffected. But, together they may pass on to their puppies the three dominant genes that make abnormal formation of the hips. Simply put . . . if the parents are carrying genetic material for hip dysplasia - so will the offspring. |
 | ตอบ: ตะโพก ร้าย Hip Dysplasia |
So ,it is difficult to identify whether the parents are carrying genetic material for hip dysplasia or not.  |
| Re: ตอบ: ตะโพก ร้าย Hip Dysplasia |
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That is true. It was once thought that to breed "good to good" would solve the problem. But, now it was found that Canine Hip Dysplasia is caused by the presence of many genes (polygenic) No environmental causes have been found, but many factors can contribute to varying symtoms of CHD in dogs. Whereas poor nutrition or physical stress will not cause CHD, it can make a dog affected with the disease display more marked symptoms. The only available way to help reduce the Hip Dysplasia is by selectively breeding for normal hips. Unfortunately, one cannot make a reliable diagnosis of Hip Dysplasia on the basis of lameness or gait. X-ray is the only means for evaluating the hip grade. As we discussed before a dog who "looks" ok may sire many litters with no problem, then bred to a certain dam will produce puppies with apparent problems. It was the combination of the certain set of genes combined together that caused it. http://www.news.cornell.edu/science/July96/dysplasia.hrs.html http://www.offa.org/hipguide.html are informative links. |